Stack Overflow
Q&A for professional and enthusiast programmers
Physics
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Mathematics
Q&A for people studying math at any level and professionals in related fields
Area 51
Stack Exchange Network staging zone, where users come together to build new Q&A sites
Meta Stack Overflow
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Web Applications
Q&A for power users of web applications
Theoretical Computer Science
Q&A for theoretical computer scientists and researchers in related fields
Stack Apps
Q&A for apps, scripts, and development with the Stack Exchange API
Server Fault
Q&A for professional system and network administrators
English Language & Usage
Q&A for linguists, etymologists, and serious English language enthusiasts
Unix & Linux
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems.
Programmers
Q&A for professional programmers interested in conceptual questions about software development
Bicycles
Q&A for people who build and repair bicycles, people who train cycling, or commute on bicycles
Academia
Q&A for academics and those enrolled in higher education
Programming Puzzles & Code Golf
Q&A for programming puzzle enthusiasts and code golfers
Computational Science
Q&A for scientists using computers to solve scientific problems
